Apparatus for separating liquids of different specific gravities



May 29, 1928.

W. LINNMANN, JR

APPARATUS FOR SEPARATING LIQUIDS OF DIFFERENT SPECIFIC GRAVI'IIES FiledNov.-22. 1926 f Patented May 29, 1928. I

I UNITED STATES PATENT WILHELM LINNMANN, JR., ESSEN-ALTENESSEN, G R

FFICE.

UED

Application filed November 22, 1.926, Serial no. 149,851, and iiiGermany J'anuaryjS, 1828- My invention relates to improvements inapparatus for separating liquids of difli'erent specific gravities, andmore particularly in apparatus for separating light liquids 6 fromwaste-water, in which the outlet is adapted to be automatically closedby means of a float valve as soon as a certain amount- 90 outlet, thesaid outlet being directed u wardly within the tank and adapted to' eclosed by a valve disk connected with a floating hood surrounding theinlet end of the outlet. Thus while t e layer of benzol collected on thesurface of the water isthin, the valve disk is held a certain distanceaway from the inlet end of the outlet pipe, and when a thick layer ofbenzol has collected on the top of the water the floating hood sinksinto the said benzol by reason of the reduced specific gravity of themedium in which it is immersed, until finally the valve disk is seatedon the inletend of the outlet and the delivery of waste-water isrevented.

ther objects of the improvements will be understood from the followingdescription.

For the purpose of explaining the inven- 40 tion several examplesembodying the same have been shown. in the acompanying drawings in whichthe same letters of reference have been used in all the views toindicate corresponding parts. In said drawings, Fig. 1, is a sectionalelevation showing the apparatus,

Fi 2, is a partial sectional elevation showlng a modification, and

Fig. 3, is a partial sectional elevation showing another modification.

In the example shown in Fig. 1 my improved separating apparatuscomprises a tank a divided by a vertical partition 0 having in its upperpart an opening 9 into two .5 chambers b and h communicating with eachother at the bottom of the tank and through inlet end of the the opening9. The chamber h is provided with an inlet pipe 2', and the chamber 6with an outlet pipe 7', the outlet pipe 7' having an inner portion atdirected upwardly. The ortion d of the outlet pipe is surrounded y atubular member m which is open atits top and bottom, and which issurrounded by a pipe e constructed at its bottom end in the form of anannular float is. To a bar a fixed to or made integral with the pipe 6 avalve disk 7 is secured which is in position for closing the inlet endof the pipe section d. The top part of the pipe e extends into a fixedhood t.

In the operation of the apparatus the waste-water having benzol admixedthereto is delivered into the chamber h of the tank through the pipe 71,and it rises within the said chamber so far that the passage n throughwhich the chambers b and hcommunicate with each other is closed. Thusthe benzol is separated from the water within the chamber h, and thereis only waste water and .no benzol within the chamber 6. After a whilethe water within the chamber 6 closes the tubular member an at itsbottom and thereafter the level of the liquid rises to a' point abovethe bottom end of the opening 9. Now the benzol collected on the surfaceof the water flows into the chamber 6. 4

through the pipe d, 7'. It will be noted.

however that no benzol is discharged, because the liquid is supplied tothe tubular member m 'inclusively from the bottom thereof. At thebeginning of the operation the level of the liquid will not rise abovethe ipe (I. But when the layer of benzol collected on the surface of thewater is increased, the level of the benzol within the part of thechamber 7) outside the tubular member m will rise, while the level ofthe water within the tubular member m will not rise above the inlet endof the pipe d, by reasonof the different specific gravities of theliquids. After some time the benzol rises so far that it closes the hoodt at its bottom end, whereupon the air confined within the said hood iscompressed and the rising of the benzol to the top of the pipe 6 isprevented. Further, the float 7a, which is now immersed into a liquid oflower specific gravity, sinks so far that the disk f closes the pipesection. (1, whereupon the dischar e of water is interrupted. The waterwifi rise above the disk f and force the same downwardly and on itsseat.

Now the benzol is tapped oil, whereupon water from the tubular member mflows into the outer part of the chamber 72, so far that the float ishas again the tendency'to raise the disk f from its scat. By tap ing oilthe benzol, communication between t 1e inner part of the pipe 6 withthe'outer airis again established, and further the air will graduallyflow between the valve f and the pipe (Z so that the float k canreadily. raise the valve disk f from 1 its seat, whereupon the dischargeof the waste-water through the pipe d is continued.

In Fig. 2 I have shown a modification in which the top plate of the hoodis depressed downwardly and into the top part of the pipe e. Thereby thefunction of the hood preventing the flow of benzol above the top part ofthe pipe 6 is further improved. Otherwise the construction of theapparatus is the same as that described with reference to Fig. 1, andthe same letters of reference have been used to indicate correspondingparts.

In the modification shown in Fig. 3 the pipe e connected with the float1c ends at its top into a portion 11; of reduced diameter surrounded bya hood t of comparatively small diameter. Further, the valve disk f isconnected with the pipe e by means of a tubular portion 0 formed withone or more openings :1: through which the waste-water ha's'access tothe part above the valve disk f and the connection of the inner part of.the tubular member m' with the outer air is established after tappingoff the -benzol, as has been described with reference to Fig.v 1.

While in describing the'invention reference has been made to particularexamples embodying the same I wish it to be understood that I do notlimit myself to the constructions shown in the drawings and that variouschanges may be made in the eneral arrangement of the apparatus and t ec011- struction of its parts without departing from the invention.

I claim:

different specific gravities, com rismg a tank having an inlet and'anout et, a tubular tending upwardly therefrom, a valve diskcarried bysaid float and adapted to close said plpe, and a fixed hood surroimdlngthe top part of said float.

2. An apparatus for separating liquids of different specific gravities,comprising av tank having an inlet-and an outlet in the form of a liquidseal and having an overflow, a

tubular member within said tank open at its top and bottom, and havingits top part located above the level of said overflow, a pi pe connectedwith said outlet and extending upwardly therefrom and into said tubularmember, an annular float surrounding said tubular member and extendingupwardly therefrom, a valve disk carried by said float and adapted toclose said pipe, and a fixed hood surrounding the'top part of saidfloat. 3. An apparatus for separating liquids of different specificgravities,comprising a tank having an inlet and an outlet, a tubularmember within said tank open at its top and bottom, a pipe connectedwith said outlet and extending upwardly therefrom and into sai tubularmember, an annular float surrounding said tubular member and extendingupwardly therefrom and reduced in diameter at its top, a valve diskfixed to a tubular part depending from the top part of said float andinto said tubular member and into position for closing said pipe, and afixed hood surrounding the reduced top part of said 4. An apparatus forseparating liquids of different specific gravities, comprising a tankhaving an inlet and an outlet, a tubular member within said tank' openat its top and bottom, a pipe connected with said outlet and extendingupwardly therefrom and into said tubular member, an annular floatsurrounding said tubular member and ex tending upwardly therefrom, avalve disk carried by' said float and adapted toclose said pipe, and afixed hood surrounding the .top part of "said float, the top wall ofsaid hood being directed downwardly and into said float.

In testimony whereof I hereunto aflix my signature.

.- WILHELMv LINNMANN, JR-

